diff --git a/courseA/ArgoUML_Forward/problem1/ArgoUML1_Forward_Delta.html b/courseA/ArgoUML_Forward/problem1/ArgoUML1_Forward_Delta.html
index 9c9d204..96b42d3 100644
--- a/courseA/ArgoUML_Forward/problem1/ArgoUML1_Forward_Delta.html
+++ b/courseA/ArgoUML_Forward/problem1/ArgoUML1_Forward_Delta.html
@@ -98,6 +98,12 @@
                 「オブジェクトの接近過程」ビュー上の「参照時点」をクリックしていってください.<br>
                 <div class = "image"><img src = "./images/images_problem1_delta/ArgoUML_1_delta_20.png" class = "threeQuartersSize"></div>
             </p>
+            <p class = "explanation">
+                ここで課題A1の接近過程抽出は終了です.<br>
+                「オブジェクトの接近過程」ビューを全て閉じ, そのあとデバッグ実行を終了してください.<br>
+                デバッグ実行を終了したら, この「トレースデバッガ(逆方向)」のパースペクティブを閉じてください.<br>
+                <div class = "image"><img src = "./images/images_problem1_delta/ArgoUML_1_delta_23.png" class = "threeQuartersSize"></div>
+            </p>
         </p>
     </body>
 </html>
\ No newline at end of file
diff --git a/courseA/ArgoUML_Forward/problem2/ArgoUML2_Forward_Delta.html b/courseA/ArgoUML_Forward/problem2/ArgoUML2_Forward_Delta.html
index 16e958d..dc940c0 100644
--- a/courseA/ArgoUML_Forward/problem2/ArgoUML2_Forward_Delta.html
+++ b/courseA/ArgoUML_Forward/problem2/ArgoUML2_Forward_Delta.html
@@ -29,10 +29,11 @@
                 その状態のままで, ブレークポイントビュー上にある「ブレークポイントを取り入れる」をクリックしてください.<br>
                 ブレークポイントを取り入れたら, デバッグ実行してください.<br>
                 そのあと, 再開ボタンを2回押してください.<br>
+                すると, 現在の実行時点が2回目の SelectionManager クラスの addFig(Fig) メソッドの130行目に移ります.<br>
                 <div class = "image"><img src = "./images/images_problem2_delta_pre/ArgoUML_2_delta_05.png" class = "threeQuartersSize"></div>
             </p>
             <p class = "explanation">
-                現在は, SelectionManager クラスの addFig(Fig) メソッドの130行目にいます.<br>
+                現在は, 2回目の SelectionManager クラスの addFig(Fig) メソッドの130行目にいます.<br>
                 ここで, ステップネクストを3回押してください.<br>
                 <div class = "image"><img src = "./images/images_problem2_delta_pre/ArgoUML_2_delta_06.png" class = "threeQuartersSize"></div>
             </p>
@@ -63,6 +64,12 @@
                 「オブジェクトの接近過程」ビュー上の「参照時点」をクリックしてください.<br>
                 <div class = "image"><img src = "./images/images_problem2_delta/ArgoUML_2_delta_09.png" class = "threeQuartersSize"></div>
             </p>
+            <p class = "explanation">
+                ここで課題A2の接近過程抽出は終了です.<br>
+                「オブジェクトの接近過程」ビューを全て閉じ, そのあとデバッグ実行を終了してください.<br>
+                <!--デバッグ実行を終了したら, この「トレースデバッガ(逆方向)」のパースペクティブを閉じてください.<br>-->
+                <div class = "image"><img src = "./images/images_problem2_delta/ArgoUML_2_delta_11.png" class = "threeQuartersSize"></div>
+            </p>
         </p>
     </body>
 </html>
\ No newline at end of file
diff --git a/courseA/ArgoUML_Forward/problem2/images/images_problem2_delta/ArgoUML_2_delta_13.png b/courseA/ArgoUML_Forward/problem2/images/images_problem2_delta/ArgoUML_2_delta_13.png
index 5af0e3f..afe34d5 100644
--- a/courseA/ArgoUML_Forward/problem2/images/images_problem2_delta/ArgoUML_2_delta_13.png
+++ b/courseA/ArgoUML_Forward/problem2/images/images_problem2_delta/ArgoUML_2_delta_13.png
Binary files differ
diff --git a/courseA/JHotDraw_Reverse/problem1/JHotDraw1_Reverse_Delta.html b/courseA/JHotDraw_Reverse/problem1/JHotDraw1_Reverse_Delta.html
index fe3e8c1..8a7dda5 100644
--- a/courseA/JHotDraw_Reverse/problem1/JHotDraw1_Reverse_Delta.html
+++ b/courseA/JHotDraw_Reverse/problem1/JHotDraw1_Reverse_Delta.html
@@ -50,6 +50,12 @@
                 「オブジェクトの接近過程」ビュー上の「参照時点」をクリックしてください.<br>
                 <div class = "image"><img src = "./images/images_problem1_delta/JHotDraw_1_delta_10.png" class = "threeQuartersSize"></div>
             </p>
+            <p class = "explanation">
+                ここで課題A3の接近過程抽出は終了です.<br>
+                「オブジェクトの接近過程」ビューを全て閉じてください.<br>
+                なお, デバッグ実行は終了せずにそのままの状態にしておいてください.<br>
+                <div class = "image"><img src = "./images/images_problem1_delta/JHotDraw_1_delta_11.png" class = "threeQuartersSize"></div>
+            </p>
         </p>
     </body>
 </html>
\ No newline at end of file
diff --git a/courseA/JHotDraw_Reverse/problem2/JHotDraw2_Reverse_Delta.html b/courseA/JHotDraw_Reverse/problem2/JHotDraw2_Reverse_Delta.html
index b35167c..c3f4de8 100644
--- a/courseA/JHotDraw_Reverse/problem2/JHotDraw2_Reverse_Delta.html
+++ b/courseA/JHotDraw_Reverse/problem2/JHotDraw2_Reverse_Delta.html
@@ -136,8 +136,11 @@
                 「オブジェクトの接近過程」ビュー上の「参照時点」をクリックしてください.<br>
                 <div class = "image"><img src = "./images/images_problem2_delta/JHotDraw_2_delta_36.png" class = "threeQuartersSize"></div>
             </p>
-
-
+            <p class = "explanation">
+                ここで課題A4の接近過程抽出は終了です.<br>
+                「オブジェクトの接近過程」ビューを全て閉じ, そのあとデバッグ実行を終了してください.<br>
+                <div class = "image"><img src = "./images/images_problem2_delta/JHotDraw_2_delta_38.png" class = "threeQuartersSize"></div>
+            </p>
         </p>
     </body>
 </html>
\ No newline at end of file
diff --git a/courseB/ArgoUML_Reverse/problem1/ArgoUML1_Reverse_Delta.html b/courseB/ArgoUML_Reverse/problem1/ArgoUML1_Reverse_Delta.html
index e30c5b6..d3b4586 100644
--- a/courseB/ArgoUML_Reverse/problem1/ArgoUML1_Reverse_Delta.html
+++ b/courseB/ArgoUML_Reverse/problem1/ArgoUML1_Reverse_Delta.html
@@ -84,6 +84,12 @@
                 「オブジェクトの接近過程」ビュー上の「参照時点」をクリックしていってください.<br>
                 <div class = "image"><img src = "./images/images_problem1_delta/ArgoUML_1_delta_20.png" class = "threeQuartersSize"></div>
             </p>
+            <p class = "explanation">
+                ここで課題B3の接近過程抽出は終了です.<br>
+                「オブジェクトの接近過程」ビューを全て閉じてください.<br>
+                なお, デバッグ実行は終了せずにそのままの状態にしておいてください.<br>
+                <div class = "image"><img src = "./images/images_problem1_delta/ArgoUML_1_delta_21.png" class = "threeQuartersSize"></div>
+            </p>
         </p>
     </body>
 </html>
\ No newline at end of file
diff --git a/courseB/ArgoUML_Reverse/problem2/ArgoUML2_Reverse_Delta.html b/courseB/ArgoUML_Reverse/problem2/ArgoUML2_Reverse_Delta.html
index 1992013..f383759 100644
--- a/courseB/ArgoUML_Reverse/problem2/ArgoUML2_Reverse_Delta.html
+++ b/courseB/ArgoUML_Reverse/problem2/ArgoUML2_Reverse_Delta.html
@@ -50,6 +50,11 @@
                 「オブジェクトの接近過程」ビュー上の「参照時点」をクリックしてください.<br>
                 <div class = "image"><img src = "./images/images_problem2_delta/ArgoUML_2_delta_09.png" class = "threeQuartersSize"></div>
             </p>
+            <p class = "explanation">
+                ここで課題B4の接近過程抽出は終了です.<br>
+                「オブジェクトの接近過程」ビューを全て閉じ, そのあとデバッグ実行を終了してください.<br>
+                <div class = "image"><img src = "./images/images_problem2_delta/ArgoUML_2_delta_11.png" class = "threeQuartersSize"></div>
+            </p>
         </p>
     </body>
 </html>
\ No newline at end of file
diff --git a/courseB/ArgoUML_Reverse/problem2/images/images_problem2_delta/ArgoUML_2_delta_13.png b/courseB/ArgoUML_Reverse/problem2/images/images_problem2_delta/ArgoUML_2_delta_13.png
index 5af0e3f..afe34d5 100644
--- a/courseB/ArgoUML_Reverse/problem2/images/images_problem2_delta/ArgoUML_2_delta_13.png
+++ b/courseB/ArgoUML_Reverse/problem2/images/images_problem2_delta/ArgoUML_2_delta_13.png
Binary files differ
diff --git a/courseB/JHotDraw_Forward/problem1/JHotDraw1_Forward_Delta.html b/courseB/JHotDraw_Forward/problem1/JHotDraw1_Forward_Delta.html
index 2766dab..c193818 100644
--- a/courseB/JHotDraw_Forward/problem1/JHotDraw1_Forward_Delta.html
+++ b/courseB/JHotDraw_Forward/problem1/JHotDraw1_Forward_Delta.html
@@ -66,6 +66,12 @@
                 「オブジェクトの接近過程」ビュー上の「参照時点」をクリックしてください.<br>
                 <div class = "image"><img src = "./images/images_problem1_delta/JHotDraw_1_delta_10.png" class = "threeQuartersSize"></div>
             </p>
+            <p class = "explanation">
+                ここで課題B1の接近過程抽出は終了です.<br>
+                「オブジェクトの接近過程」ビューを全て閉じてください.<br>
+                デバッグ実行を終了したら, この「トレースデバッガ(逆方向)」のパースペクティブを閉じてください.<br>
+                <div class = "image"><img src = "./images/images_problem1_delta/JHotDraw_1_delta_11.png" class = "threeQuartersSize"></div>
+            </p>
         </p>
     </body>
 </html>
\ No newline at end of file
diff --git a/courseB/JHotDraw_Forward/problem2/JHotDraw2_Forward_Delta.html b/courseB/JHotDraw_Forward/problem2/JHotDraw2_Forward_Delta.html
index f9ea413..707ae99 100644
--- a/courseB/JHotDraw_Forward/problem2/JHotDraw2_Forward_Delta.html
+++ b/courseB/JHotDraw_Forward/problem2/JHotDraw2_Forward_Delta.html
@@ -146,8 +146,12 @@
                 「オブジェクトの接近過程」ビュー上の「参照時点」をクリックしてください.<br>
                 <div class = "image"><img src = "./images/images_problem2_delta/JHotDraw_2_delta_36.png" class = "threeQuartersSize"></div>
             </p>
-
-
+            <p class = "explanation">
+                ここで課題B2の接近過程抽出は終了です.<br>
+                「オブジェクトの接近過程」ビューを全て閉じ, そのあとデバッグ実行を終了してください.<br>
+                <!--デバッグ実行を終了したら, この「トレースデバッガ(逆方向)」のパースペクティブを閉じてください.<br>-->
+                <div class = "image"><img src = "./images/images_problem2_delta/JHotDraw_2_delta_38.png" class = "threeQuartersSize"></div>
+            </p>
         </p>
     </body>
 </html>
\ No newline at end of file