"better mastery" is correct and usable in written English.
You can use it to describe understanding a subject or skill to a greater degree than before. For example, "Having studied the subject extensively, she had better mastery of the topic than before."
When he came to register this week, he was told he needed better mastery of English before he could enroll.
I began to study on my own because I didn't even have money to be able to take a course, and over the years I've come to have a better mastery of the language.
The purpose of the study was to determine the factors responsible for students' preference for pidgin English with a view to come up with the strategies to minimize if not eradicate the factors in order to pave way for a better mastery of Standard English.
French science students would benefit from a better mastery of English, the current lingua franca of science, he says.
The proportion of patients ventilated invasively is currently as low as 5 10 % with a lower failure rate (around 10%%) in relation with a better mastery of NIV, the so-called learning curve, as underscored by Dres et al. [54].
By my last term in office, I was proud not just of the team we had built, and the way we worked together, but also of how I'd developed a better mastery over myself.
A ton of research demonstrates equal or better content mastery by students taking quality online courses.
Learning and getting better, building mastery...it's incredibly addictive.
Better metacognitive mastery is linked to better social cognition and more insight [ 2, 15] and metacognition has been found to mediate the impact of neurocognitive deficits on social function, after controlling for symptoms [ 16].
Saberi and Ronaghi founded Venture Lab to help teachers who found that current MOOC offerings didn't cater to their style, working better for mastery-focused courses than those that are more open-ended — or focused on teaching creative disciplines.
With World of Warcraft, I described how altering the design could accommodate mobile play and better motivate increasing mastery.
