What is the fine-grained topic of the following text: Yet at the same time, jobs in science, technology, engineering and mathematics — or STEM — in the U.S. are expected to grow at a higher rate than non-STEM jobs through 2018, resulting in 2.4 million unfilled job vacancies in the most influential occupations, according to Adecco Staffing Solutions Inc.
Teachers recognize that one key to solving the problem lies in technology, yet only 2 percent of U.S. science teachers in grades 6-12 believe they have the effective digital instructional tools they need, according to a 2014 survey conducted by the Bill and Melinda Gates Foundation. Only return the topic.
The shortage of effective digital instructional tools for science teachers and growth of STEM jobs in the U.S.