"focus on class" is correct and can be used in written English.
You can use it when you want to encourage someone to concentrate and pay attention in class. For example: "If you want to do well on the test, make sure you focus on class."
Socialism, Laclau and Mouffe argued, should no longer focus on class warfare.
Presaging his recent focus on class, Mr. Obama argued that whites were more likely to join blacks in supporting programs that were not racially based.
Their figures focus on Class A distribution centers — the newest and most modern facilities — while CB Richard Ellis's data includes older warehouses as well.
"My reluctant conclusion is that the only way to get universities to focus on class is if they can't first use race," he said.
His focus on class played least well when, asked about racial blind spots, he produced a mangled sentence suggesting that white people didn't know about poverty and life in "a ghetto".
One is that the focus on class size and academic performance overlooks the effect of class size on other aspects of classroom life, such as relationships, discipline and catering for pupils with special educational needs.
Lechner & Wunsch (2009) focus on class-room training, which - like in the Danish case - is the most used activation type in the German active labour market system.
This paper offers a reflective discussion of recent developments in active learning pedagogical approaches, with a focus on class-flipping and peer instruction.
You should also focus on classes in economics, history, social sciences, writing, cultural diversity, public speaking and political science.
RNR proteins have been classified into three classes [10]; we focus on classes I and II as class III proteins share very little similarity with the other two classes [11].
We focus on class-level gene transfers to avoid any errors in assembly at lower taxonomic levels that can affect the accuracy of classification.
