diff --git a/pythonetc/README.md b/pythonetc/README.md
index ee0d233..0f27b57 100644
--- a/pythonetc/README.md
+++ b/pythonetc/README.md
@@ -89,8 +89,8 @@ More:
 1. ./typed-dict.md              (25 March 2021, 18:00)
 1. ./getattr-annotation.md      (30 March 2021, 18:00)
 1. ./eval-strategy.md           (01 April 2021, 18:00)
-1. ./deepcopy.md
-1. ./eval-order.md
+1. ./deepcopy.md                (6 April 2021, 18:00)
+1. ./eval-order.md              (8 April 2021, 18:00)
 1. ./key-error.md
 1. ./dedent.md
 1. ./immutable.md
@@ -130,3 +130,5 @@ When to use is
 In uses hash, not eq
 sre_parse
 super()
+gc
+trace
diff --git a/pythonetc/deepcopy.md b/pythonetc/deepcopy.md
index c9cd099..6ecd6ac 100644
--- a/pythonetc/deepcopy.md
+++ b/pythonetc/deepcopy.md
@@ -1,6 +1,6 @@
-What if we want to modify a collection inside a function but don't want these modifications affect the caller code? Then we should explicitly copy the value.
+What if we want to modify a collection inside a function but don't want these modifications to affect the caller code? Then we should explicitly copy the value.
 
-For this purpose, all built-in collections provide method `.copy`:
+For this purpose, all mutable built-in collections provide method `.copy`:
 
 ```python
 def f(v2):
diff --git a/pythonetc/eval-order.md b/pythonetc/eval-order.md
index 1625d22..ded14fe 100644
--- a/pythonetc/eval-order.md
+++ b/pythonetc/eval-order.md
@@ -1,4 +1,4 @@
-Python uses [eager evaluation](https://en.wikipedia.org/wiki/Eager_evaluation). When a function is called, all it's arguments are evaluated from left to right and only then their results are passed into the function:
+Python uses [eager evaluation](https://en.wikipedia.org/wiki/Eager_evaluation). When a function is called, all its arguments are evaluated from left to right and only then their results are passed into the function:
 
 ```python
 print(print(1) or 2, print(3) or 4)
@@ -7,7 +7,7 @@ print(print(1) or 2, print(3) or 4)
 # 2 4
 ```
 
-Operators `and` and `or` are lazy, the right value is evaluated only if needed (for `or` if the left value is falsy, and for `and` if the left value is truely):
+Operators `and` and `or` are lazy, the right value is evaluated only if needed (for `or` if the left value is falsy, and for `and` if the left value is truthy):
 
 ```python
 print(1) or print(2) and print(3)
diff --git a/rpg/bend-intro.md b/rpg/bend-intro.md
index bd6bc46..999c279 100644
--- a/rpg/bend-intro.md
+++ b/rpg/bend-intro.md
@@ -31,12 +31,12 @@ When we finish building all characters and the world, you'll be able to go on an
 
 1. You decide where you want to go and what to do. In the very beginning, I'll present a list of rumors that you've heard from other kids. Some of them are true, some of them are overdramatized, some of them aren't real at all. But don't be afraid to pick a "wrong one", any of them will lead to an interesting discovery. Later, after a few adventures, you'll know the city and collect your own goals and rumors.
 1. You decide who wants to go on this adventure and make a team. The best scenario is when every time the team is different and there is no distinct team where all players are always the same. It's fun to play with different players and different characters, so you can look at similar challenges from a different perspective. The best group size is 3-4 players but I don't limit you here in any way.
-1. You pick the date and time that suits best for you. My availability is quite flexible.
+1. You pick the date and time that suits you best. My availability is quite flexible.
 1. On the date, we meet at the virtual table and play. I describe the world around you, you describe how your character reacts. We're having fun!
 1. After the session, one of the players from the team writes a summary of the adventure. Think about it like you tell other kids about what you discovered. It's ok if not everything is precise or even true. Role-play it, make more rumors, enlighten other players to go on their adventure.
 1. Repeat.
 
-If can read a bit more on specifics here: [What defines a "West Marches" campaign](https://rpg.stackexchange.com/questions/120770/what-defines-a-west-marches-campaign).
+You can read a bit more on specifics here: [What defines a "West Marches" campaign](https://rpg.stackexchange.com/questions/120770/what-defines-a-west-marches-campaign).
 
 ## The theme