diff --git a/trl/core.py b/trl/core.py
index fa18f8548e..a787301b0f 100644
--- a/trl/core.py
+++ b/trl/core.py
@@ -121,7 +121,7 @@ def entropy_from_logits(logits):
 
 
 def average_torch_dicts(list_of_dicts):
-    """Average values of a list of dicts wiht torch tensors."""
+    """Average values of a list of dicts with torch tensors."""
     average_dict = dict()
     for key in list_of_dicts[0].keys():
         average_dict[key] = torch.mean(torch.stack([d[key] for d in list_of_dicts]), axis=0)
diff --git a/trl/models/modeling_base.py b/trl/models/modeling_base.py
index 01322d172d..7b18da4a1c 100644
--- a/trl/models/modeling_base.py
+++ b/trl/models/modeling_base.py
@@ -120,7 +120,7 @@ class and the arguments that are specific to trl models.
                     is_shared = True
 
             if is_shared:
-                # dowload each file and add it to the state_dict
+                # download each file and add it to the state_dict
                 state_dict = {}
                 for shard_file in files_to_download:
                     filename = hf_hub_download(pretrained_model_name_or_path, shard_file)
diff --git a/trl/models/modeling_value_head.py b/trl/models/modeling_value_head.py
index b4ad3d7795..db7e40cf21 100644
--- a/trl/models/modeling_value_head.py
+++ b/trl/models/modeling_value_head.py
@@ -189,7 +189,7 @@ def generate(self, *args, **kwargs):
     def state_dict(self, *args, **kwargs):
         r"""
         Returns the state dictionary of the model. We add the state dictionary of the value head
-        to the state dictionary of the wrapped model by preprending the key with `v_head.`.
+        to the state dictionary of the wrapped model by prepending the key with `v_head.`.
         """
         pretrained_model_state_dict = self.pretrained_model.state_dict(*args, **kwargs)
         v_head_state_dict = self.v_head.state_dict(*args, **kwargs)
@@ -205,7 +205,7 @@ def push_to_hub(self, *args, **kwargs):
     def post_init(self, state_dict):
         r"""
         We add the state dictionary of the value head to the state dictionary of the wrapped model
-        by preprending the key with `v_head.`. This function removes the `v_head.` prefix from the
+        by prepending the key with `v_head.`. This function removes the `v_head.` prefix from the
         keys of the value head state dictionary.
         """
         for k in list(state_dict.keys()):
@@ -260,7 +260,7 @@ def _has_lm_head(self):
     def post_init(self, state_dict):
         r"""
         We add the state dictionary of the value head to the state dictionary of the wrapped model
-        by preprending the key with `v_head.`. This function removes the `v_head.` prefix from the
+        by prepending the key with `v_head.`. This function removes the `v_head.` prefix from the
         keys of the value head state dictionary.
         """
         for k in list(state_dict.keys()):
@@ -272,7 +272,7 @@ def post_init(self, state_dict):
     def state_dict(self, *args, **kwargs):
         r"""
         Returns the state dictionary of the model. We add the state dictionary of the value head
-        to the state dictionary of the wrapped model by preprending the key with `v_head.`.
+        to the state dictionary of the wrapped model by prepending the key with `v_head.`.
         """
         pretrained_model_state_dict = self.pretrained_model.state_dict(*args, **kwargs)
         v_head_state_dict = self.v_head.state_dict(*args, **kwargs)
diff --git a/trl/trainer/ppo_trainer.py b/trl/trainer/ppo_trainer.py
index de809de2ce..b25642528b 100644
--- a/trl/trainer/ppo_trainer.py
+++ b/trl/trainer/ppo_trainer.py
@@ -92,6 +92,8 @@
 class PPOTrainer(BaseTrainer):
     """
     The PPOTrainer uses Proximal Policy Optimization to optimise language models.
+    Note, this trainer is heavily inspired by the original OpenAI learning to summarize work here:
+    https://github.com/openai/summarize-from-feedback
 
     Attributes:
         **config** (`PPOConfig`) -- Configuration object for PPOTrainer. Check the documentation of `PPOConfig` for more
@@ -346,7 +348,7 @@ def generate(self, query_tensor: torch.Tensor, **generation_kwargs):
         Args:
             query_tensor (`torch.LongTensor`):
                 A tensor of shape (`batch_size`, `seq_len`) containing query tokens.
-            gen_kwargs (dict[str, Any]):
+            generation_kwargs (dict[str, Any]):
                 Keyword arguments for generation.
 
         Returns:
@@ -812,7 +814,7 @@ def log_stats(
             stats (dict[str, Any]):
                 A dictionary of training stats.
             batch (dict[str, Any]):
-                A dictionary of batch data, this containes the queries and responses.
+                A dictionary of batch data, this contains the queries and responses.
             rewards (`List[torch.FloatTensor]`):
                 A tensor of rewards.
         """