diff --git a/model-basics.Rmd b/model-basics.Rmd
index f2107e4..09323c0 100644
--- a/model-basics.Rmd
+++ b/model-basics.Rmd
@@ -727,4 +727,4 @@ This chapter has focussed exclusively on the class of linear models, which assum
   by models like __random forests__ (e.g. `randomForest::randomForest()`) or 
   __gradient boosting machines__ (e.g. `xgboost::xgboost`.)
 
-These models all work similarly from a programming perspective. Once you've mastered linear models, you should find it easy to master the mechanics of these other model classes. Being a skilled modeller mixture of having some good general principles and having a big toolbox of techniques. Now that you've learned some general tools and one useful class of models, you can go on and learn more classes from other sources.
+These models all work similarly from a programming perspective. Once you've mastered linear models, you should find it easy to master the mechanics of these other model classes. Being a skilled modeller is a mixture of having some good general principles and having a big toolbox of techniques. Now that you've learned some general tools and one useful class of models, you can go on and learn more classes from other sources.