Here is a collection of activities for learning Spanish. When critical thinking in a second language, it's important to consider how background knowledge may not bee in the target language, but you can help students produce language by studying grammar in conjunction with reading or listening. A lot of second language acquisition scholars are debunking the notion that learning grammar is the pre-requisite to critical thinking in the target language. They can develop side by side with lots of structure and support from the teacher!
From the article:
A high-fat diet in adolescence appears to have long-lasting effects on learning and memory during adulthood, a new study in mice finds.
"The researchers calculated how much of the variation in MCAS scores was due to the school that students attended. For MCAS scores in English, schools accounted for 24 percent of the variation, and they accounted for 34 percent of the math MCAS variation. However, the schools accounted for very little of the variation in fluid cognitive skills - less than 3 percent for all three skills combined."